FILE — A chip of silicon carbide at a lab at the University of Chicago, Nov 16, 2018. The field of power electronics is changing as engineers switch to power-control devices based not on silicon chips but on new materials like silicon carbide that handle electricity more quickly and efficiently. Lyndon French/The New York Times

What’s down the road for silicon?

Even as companies upgrade to silicon carbide and gallium nitride, researchers are developing new WBG materials that could further improve power electronics